8 PHYSIOLOGY FOR THE LABORATORY. 



B. Cells of Other Tissues. 



Material. Prepared sections of skin, connective tissue, fatty tissue, 

 and cartilage. A section of skin from the roof of a rabbit's mouth 

 will show I, II, and III finely. 



Apparatus. A compound microscope. 



Examine, in the same way as in A, prepared sections 

 of the skin, connective tissue, fatty tissue, and cartilage. 



Notice : 



I. EPITHELIAL TISSUE. 



a. Is it composed of cells or fibres ? 



b. How are they arranged? 



c. Notice the change in shape and structure as we pro- 

 ceed from the inside outward. 



II. CONNECTIVE TISSUE. 



a. Is it cellular or fibrous ? 



b. What does its structure suggest as to its use ? 



III. FATTY, OR ADIPOSE TISSUE. 



a. Where is it found? 



b. Compare the cells with those of epithelium. 



c. Do you find any nucleus ? The protoplasm has been 

 changed to oil. 



IV. CARTILAGE. 



a. The scattered condition of cells. 



b. Do you find nuclei or cell-wall? 



c. The substance intervening between the cells is neither 

 cellular nor fibrous. 



